CBG Center for family history and the IISH have joined forces. They have been doing that for a while, but now we can share some special result, both for scientists as for the general public.
The marriage certificates from LINKS (a project of the HSN) are now available via the WieWasWie website. You can now build up your family tree in a shorter period of time from the introduction of the Civil Registry and establish relationships, which at first had not (simply) emerged. The IISH provides the data for this.